Spark-plug attachment.



E. ROLLE.

SPARK PLUG ATTACHMENT.

APPLICATION FILED $313.13, 1914.

1 9 1 3 1 556 a Patented Mar. 9, 191.5.

Emile H0726 designates grnerally a spark ldhlElll tlitlralllliltd T EMILE ROLLB, OF FRONTENAC, KANSAb".

SPARK-"P12 UG ATTACHMENT.

menses.

Application filed February 18, 1914.

Roms, a citiresiding at Fronte- Crawford and State I have invented certain new and useful. Improvements in Spark-Plug Attachrnents; and I do hereby declare the folfull, clear, and exact de- I such as will onart to which it appertains to make and use the same.

Iy invention relates to new and useful improvements in spark plugs and more par- I therefor which will prevent accumulation of carbon at spanking bustion of th inder.

An important object of my invention is to provide a simple and ineXpensive attache gases within. the engine cyldescribed which is tion, rel ble and efficient in operation, cheap to manufacture.

1e above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and t1 particularly are appended hereto and form a part of this application.

ith reference to the drawings, wherein have illustrated the preferred embodiment it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts: Figure I is a side elevation showing my attachment attached to a spark plug, Fig. 2 is a longitudinal sectional view showing my attachment in operative attached position. Fig. is a detail side elevation of the conical protecting cap for the electrodes of the plug, Fig. 4 a detail perspective view of the holder for the cap, and Fig. 5 is a detail perspective view of a slightly modified form of holder.

Referring to the drawings, the numeral 1 plug consist ing of the usual stationary electrode 2 and adjustable electrode l'y improved attachment consists of a Specification of Letters Patent.

ferential spaced apertures points and insure the proper com- Patented ltllar. Serial No. 828,522.

formed of provided at rows of circum- 5 which are degases of the engine The cap 4 is also conical protectin cap 4 that is some suitable light metal and its larger end with two signed to permit the cylinder to be ignited.

provided upon opposite sides with longitudinal slots or a .ertures 6 that are theposed adjacent the larger extremity of the cap and adapted to receive the securing arms of the holder which will be later more fully described. also provide notches or recesses that are arranged opposite to each other and disposed at the edge of the larger portion of the cap 4. ese notches or recesses 7 are designed to receive the portions of the stationary electrode 2 that are disposed adjacent to the p at the large extremity thereof. The conical cap lis closed at its apex portion and open reference to the drawings. As a means for mlding the cap 4 in position plug 1 provide a holding prising a split ring or approximately cylindrical body that is preferably formed of some suitable resilient material and provided at one end with diametrically opposed bendable securing tongues or arms 9. he holder 4 is arranged within the ower l;-:dlow portion of the spark plug 1. with its tongues 9 disposed outwardly beyond the ion or edge of the s ark plug. I The body portion 8 in being split and formed of resilient material is as will be readily seen held within the spark plug. The tongues l) are inserted through the slots or apertures 6 of the conical cap 4 and bent so in a position whereby the cap will ,be readily secured and the tongues are not in a position to interf re with the usual function of the spark plug.

it will be readily seen that the cap 46 completely covers the lower extremity of the spark plug, that is particularly the point where the spark akes place relative to the electrodes 2 and he perforations or apertures 5 provide for the proper ignition of the gases but do not permit the accumulation of carbon upon the electrodes.

It will be readily seen with reference to e foregoing description and accompanying drawingsthat l ave provideda simple and inexpensive attachment for spark plugs which will permit the proper performing of the functions of the plug and larger end as will be readily seen with prevent the accumulation of carbon and other foreign matter due to the firing of the combustible charges Within the cylii'ider, upon the electrodes of the spark plug; It is preferable to cut off the eircess length of the tongues 9 after the proper fitting or the cap i is had.

lVith reference to Fig. 5 wherein l have illustrated a slightly modified lorni oil":-

holder, the holder consists of a cylindrical body portion 10 similar to the one and provided with securing tongues ll. similar to the ones 9. I pr ide in this modified form an upstanding lug adjacent the outer end of the body portion 10 which provided at its outer end with a preferably V-shaped notch 13. This form is used in connectionwith plugs wherein the station ary electrodes do not completely extend across the hollow lower end or inner had of the spark plug;

When the attachment is in assembled position it will be readily seen with reference to, ,the foregoing description and accompanying drawings that the conical cap l is firmly held in engagement With the lower portion of the spark plug 1 through the medium of the tongues 9 carried upon the holders de scribed.

The notches or recesses 7 formed in the cap l permit the snug fitting of the cap l relative to the plum In reduction to practice, I have found that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment, is the most etlieient and practical; yet realizing that the conditions concurreni with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construc tion, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of niy invention, as defined in the appended claims.

What is claimed is 1. An attachment for spark plugs comprising a hollow. cap having one end open and adapted tO-fit upon. the lower end of a. spark plug to cover the electrodes thereof, said cap being provided with rows of spaced erforations adi'acent its open end and hav mg diametrical y opposed slots therein and menses means for securing said cap comprising a cylindrical. body portion arranged to fit within a spark plug and a pair of spaced arms carried by said body portion and adapted to be inserted through the slots in said cap and to be bent over to engage the outer surface of said cap.

2. An attachment for spark plugs comprising a hollow cap having one end open and adapted to be secured. to the lower end of a spark plug to cover the electrodes of said spark )lug, said cap having rows of spaced perforations adjacent its open end, an opposed slo formed therein, a cylindrical bodyportion arranged Within the spark plug, bendable securing tongues carried by said body port-ion and adapted to be inserted through the slots in said cap to secure said cap, and a lug formed adjacent the outer edge of ,said body portion and being provided with a V-shaped notch to receive one of the electrodes of said spark plum 3. An attachment for spark plugs comprising a hollow cap having one end open and being provided adjacent its open end with rows of spaced apertures, said cap having diametrically opposed slots therein adjacent the open end thereof and designed to cover the electrodes ot a spark plug and means for securir g said cap to the lower end of asparl: plug comprising a resilient cylindrical body portion and a pair of bendable opposedtongues formed on one end of said .body portion and to extend through the slots in said cap and being bent" to engage the outer face oi. said cap. 7

l. An attachment for-spark plugs consisting of a hollow conical cap having one end open and to be secured adjacent to the lower end of a spark plug to cover the electrodes thereof, said cap having parallel rows of spaced perforations formed therein ad gacent to its open end, a. split cylindrical re-- silient body portion arranged Within the spark plug and bendable armscarried by the body portion to cooperate with the cap to hold the cap in position.

In testimony whereof I afllx my signature in presence of two witnesses.

-EMILE ROLLE.

Witnesses:

v JACOB DITTMANN, Gus DIT'JJMAN'N. 

